From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ariel Rios <ariel@arcavia.com>
To: guile-gtk@sourceware.cygnus.com
Cc: mvo@zagadka.ping.de
Subject: Constant strings in guile-gtk...
Date: Sun, 21 Jan 2001 13:03:00 -0000
Message-id: <Pine.LNX.4.10.10101211504220.4734-100000@soleil.gnome.org>
X-SW-Source: 2001-q1/msg00003.html

Hi,
I have been wondering that guile-gtk might need
to handle const char* since a lot of of 
GNOME code is now declaring things like that...

I hacked:

  (register-type
   'cstring
   (make-type "cstring" "const char*"
	       (lambda (x) 
		(@@ "(SCM_NIMP(~a) && SCM_RWSTRINGP(~a))" x x))
	         (lambda (x copy) 
		(@@ "(~a == NULL? SCM_BOOL_F : scm_take0str ((char *)~a))"
x x))
	      'fit-for-list #t
	      'conversion "sgtk_string_conversion"))

But that seems not a good thing... I use 'sgtk_string_conversion'
for I did not found what "conversion" is suppose to do.
Also, I am only getting parse error when declaring something as 
'cstring' like:

(define-func e_cell_text_new
  ECell
  ((cstring fontname)
   (GtkJustification justify)))


ariel